Joseph K. Bradley resolved SPARK-14681.
       Resolution: Fixed
    Fix Version/s: 2.4.0

Issue resolved by pull request 20786

> Provide label/impurity stats for spark.ml decision tree nodes
> -------------------------------------------------------------
>                 Key: SPARK-14681
>                 URL: https://issues.apache.org/jira/browse/SPARK-14681
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>            Reporter: Joseph K. Bradley
>            Assignee: Weichen Xu
>            Priority: Major
>             Fix For: 2.4.0
> Currently, spark.ml decision trees provide all node info except for the 
> aggregated stats about labels and impurities.  This task is to provide those 
> publicly.  We need to choose a good API for it, so we should discuss the 
> design on this issue before implementing it.

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